Improvement in molding-machines



J. B. MCCUNE.

' Ilia/am.

N.PE'|'ERSv PHOTO-LITHOGRAPHER, WASHINGTON D, C.

UNITED STATES PATENT Prion JOSEPH B. MGGUNE, OF HAMILTON, ONTARIO,-OANADA, ASSIGNOR. OF ONE- HALF HIS RIGHT TO RICHARD M. WANZER, OF SAMEPLACE.

IMPROVEMENT IN MOLDING-MACHINES.

I Specification forming part of Letters Patent No. 189,245., dated April3, 1877; application filed February 20, 1877.

To all whom it may concern:

Be it known that I, JosEPH B. Motion, of Hamilton, in the Province ofOntario and Dominion of Canada, have invented certain new and usefulImprovements in Machines for Casting Metals, of which the following isJanuary 11, 1876, and numbered 172,044, its

object being to provide for tucking the sand uniformly around thepattern previously to finally ramming the mold.

In apparatus of this class in which a tucking-plate is employed noprovision is made for finally leveling the face of the mold, whichrenders it necessary to employ a bottom board, having a face similar inconfiguration to that of the tucking-plate, to support the sand in theflask during the subsequent process of casting. This necessitates theuse of a bottom board for every variation of pattern, which, in largefounderies, is an item of great expense.

The object of my invention is to obviate this objection, and provide anapparatus by which a sand mold may be so formed in a flask that it canbe backed by a plain or flat bottom board by ramming in and smoothingoff the sand in the flask, as more fully hereinafter described.

My invention consists in substituting for the single bracket whichcarries the ramming-plate a double bracket, one arm of which carries aramming-plate, as usual, and the other a tucking-plate, the lower faceof which is made of proper configuration, to correspond to the patternfrom which the mold is to be made, the bracket being arranged to swingloosely upon the supportingstandard, so that either the tucking orramming plate can be brought over the flask, as may be desired.

In the drawings, Figure 1 represents a side elevation of an apparatusfor forming molds with my improvement attached thereto, and Fig. 2 a topview of the same.

The letter A represents the base of the machine, and B an uprightstandard secured thereto, to the upper part of which is attached aloosely-swinging double bracket, 0, which takes the place of the singlebracket, as described in the Letters Patent granted to me as abovementioned. To one arm of said bracket is secured the horizontalramming-plate D, as usual, the other arm carrying a horizontaltucking-plate, E, the lower side of which is formed of a configurationthe inverse to that of the pattern-plate from which the mold is to beproduced, so that when the flask F, with the sand properly filled in, isforced upward toward said tucking-plate, the sand will be properlytamped and tucked around the pattern, the tuckingplate being in positiondirectly over the flask, thus dispensing with the tedious process ofhand tamping or tucking.

After the sand has been properly tucked or tamped in the flask, anadditional quantity is then filled into the flask, and the rammingplate, which has a fiat or plain face, is brought over the flask, theusual fiat bottom boardhaving been inserted in the ordinary manner byswinging the double bracket on its support, and the flask is then movedtoward said ramming-plate, forcing the sand uniformly into the flask andleveling the sand to conform to said flat bottom board.

Any suitable devices for supporting and moving the flask to and from theramming or tucking plate may be employed; but I prefer the arrangementshown and described in my above-mentioned Letters Patent, which, as theydo not form any part of my present invention, it is not necessary tomore particularly describe.

What I claim, and desire to secure by. Letters Patent, is-

1. The combination of the double swinging L bracket, carrying atucking-plate and a ramming-plate, with a flask adapted to be moved toand from said plates, the whole so arranged that the sand can be firsttucked into the flask and afterward leveled for the reception of a plainbottom board, substantially as described.

2. In combination with the upright standof the subscribing witnesses.

and, a double bracket secured loosely therei have hereunto setmy hand inthe presence to, and provided with a tucking-plate and ramming-plate, soarranged in relation to a reciprocating flask that either may be broughtover the same at will, substantially as de scribed.

In testimony that I claim the foregoing I JOSEPH B. MoOUNE. Witnesses:

JOHN BARRY, CHAS. E. FREEMAN.

